Thread splicing device



Jain. 21, 1 936.- J. F. CAVANAGH 2,028,144

THREAD SPLIC ING DEVICE I v Original Filed April 23, 1931 I v INVENTOR 16 .96 [fa/mi. Cmhmgy/p ATTORNEY Patented Jan. 21, 1936 ,.S?TAT-.E;S. PATENT OFFICE Application April 23, 1931 ,-Serial :N0. 532,351 {Renewed April 19, 1935 17 Claims; (01. 117-6) 7 g ends about the rod 39 through suitableiinks "4o "j'l'his'invention' relates to "the joining or' splicing'of'yarns, during the various processes involved in the'production iof yarn and cloth.

1 I am ;well' aware that the method of uniting the ends ofyarn's and threads by hand which involves the f application of a suitable. adhesive or "hinder to..a .pairfof overlapping thread ends, coincident to the imparting of a rolling motion to said ends; by the fingers, is oldand is widely utilized, especially in silk mills. The method has also beenused byshoe makers the binder in this instance being beeswax.

':'To perform "the splicing operation .by hand,

asideifromtheexercise .of;a certain measure of '15 skillytends toward untidiness, requiring the applicationof adhesive to the fingers. Another obje'ction to thehandmethodlsthe time consumed,

which, greatly increases the cost over ordinary knottingmethods.

'20 invention has for one of its, objects mechanicallyi splicin two .threads .to replace 1 the hand mjethod.

:Another object fofthe "invention is the splicing offth'e' threads. in'a stronger and better ,j ointthan 25 hy'handz' Aiurther obj ectof the invention is theLsp licing of thethreads more quicklythan maybe accomplished by hand and yet preserve'the better quallt t s i 30 With these andother objectsand advantageous features in" view, the invention consists of a novel arrangement :of parts more fully disclosed in the detailed description following,- in conjunction with the accompanying drawing, and more --par'ticular- 35 ly set forth, in'theappended "claims.

Fig. lis a-perspective 'view of my device;

Fig.2 is a central section, showing the mech- *anismdn its normal "state of rest;

' Fig-.""3 is'-adeta il, showing the relative posi- 1 0 'tions of the splicing members upon completion =01 a: splice;

Figs 4 is a'front 'elevation'of the thread gripping device; i i i; *Fig; r5lisxa plan view ishowing'the splicing'mem- -45 bersiand; thread gripperiwith threads in place oarrieslslide l1, upon which is mounted a co- 3 operating thread grippingjaw I8 held-normally against the jaw l6, by leaf spring 19. .Slide I1 is provided at its upper end with thread guides .and 2| and also carries cross bar; 22 for a purpose to be explained. A torsional spring 23 encircling. the rod 39 holds .the handle 14 normally-in the positionshown while the mechanism is retained in its position of rest, shown in Fig. 2. The lower part of carriage plate l3 carries a rearwardlyprojecting .rib 4| having a cam surface 24 for engagementwithstud 25 mounted on thecasing. forthe purpose of separatingtsplicing members H and i2 as shown in- Fig. 2 forthe reception of threads to be spliced. The upper .end of the rib- 4| is providedwith a hook 26 forthe purpose ofengaging cross bar 22 for moving and thus holdingthe jaws l6, and I8 normally separated againstthe tension of .a spring IS. The lower end of carriage .I3 is provided with a foot 2'! for engaging slide l1 and causing the. carriage plate 13 to tilt inits upperposition for the purpose of opening splicing members I l and .I2 as shown in Fig; 3. A cam surface 28 on rib 4| engaging with crossbar 22 forces both jaws of the entire-thread grippermechanism outward, as said carriage l3;moves upward, through the flexing of spring l5 whereby the yarn is broken at the sharpenededge 42 with frayed ends.

' Mounted upon the back of easing I ll'is elbow '29 provided with a duct leading through splicing -member H as at 30 and also provided with a suitable :check valve 3|. A similar elbow 32 and likewise provided with a check valve 33 is mounted atthe bottom of casing III while the two elbows are connected by a resilient rubber tube 34. 1 .A wire loopx35' is connectedto handle 14 at a point spaced from the pivot so that'it will move andicompress the rubber tube'34 when handle I4 is operated. This arrangement of tube 34 with elbowsI29 and 32 constitute a syringe-like pump to forceliquid'placed in the reservoir 43 in the circulation .to: :the::splicinganrembers \I la and; L I 2.

It willbe noted that the upper portion of splicing member I2 is narrower than the body and is provided with bevelled or sharp edges, as shown in Fig. 5 and I preferably make splicing members II and I2 from vitreous material, such as lava or some of the artificial abrasive stones, having a high co-efiicient of friction and also serving to retain liquid.

In operation, my device is held in one hand with the thumb across handle [4. The other hand is utilized to first pass the end of yarn 36 between splicing members H and I2 around edge of splicing member 12 under guide 2| and between jaws IB and i8 permitting the free end to fall as shown in Fig. 1. The other yarn 31 is likewise positioned from the opposite side. Handle I4 is then depressed and the carriage I3 and splicing member I2 moves upward pressing the pair of yarns under action of spring l5 through the rib 4| snugly between splicing members l l and I2. Upon the first upward movement of carriage l3 jaw I8 is permitted to move upward under action of spring l9 binding the pair of yarn ends and due to the action of cam surface 28 the jaws are forced back causing the yarns to be broken where they cross the edge of splicing member l2 by being pulled apart and thus leaving a frayed end. Binder liquid is co-incidentally being applied to the yarns while splicing members i I and I! roll the overlapping yarns into a close and even splice with ends tapered after which the members II and I2 move apart as shown in Fig. 3 to permit the work to be removed. Upon the return of the mechanism through the action of spring 23 to its position of rest, shown in Fig. 2, the severed ends may be removed from between jaws l6 and I8. I find that this latter operation is not necessary until several pairs of ends are involved.

In the making of. yarn splices Ifind that it is important that the ends to beunited be frayed, that is, the fibers should be of varying length such as produced by breaking the yarn as opposed to cutting it squarely across. I have discovered that stressing a piece of yarn across the sharp edge of an abrasive stone causes the yarn to sever invariably producing a frayed condition and I have embodied this principle of severing in this device.

Yarn ends, thus prepared, will tuck in" and intertwine much more effectively than squarely sheared ends, and reference to Fig. 6 will make clear the tapered effect produced. The center of the splice is slightly larger than the diameter of the original thread, while the frayed ends insure a taper between the two diameters as at 38 rather than an abrupt change. Furthermore, the fibrous ends make. for greater strength and. hold more securely than would be the case with sheared ends.

The foregoing description is directed solely towards the construction illustrated, but I desire 1. In a thread splicing device, means for grip,

ping a pair of ends at spaced points and moving the gripping points apart to breakthe ends to provide a frayed condition, and means for rolling the end portions of the one about the other.

2. In a thread splicing device, means for severthreads to be joined ing a pair of ends and means for rolling the end portions of the threads to be joined one about the other comprising bodily relatively recipro eating members movable in a straight line.

3. In a thread splicing device, means for severing a pair of ends, means for rolling the end portions of the threads to be joined one about the other between a pair of relatively bodily moving members, and means for causing adhesive to flow between said moving members to moisten the thread end portion as rolled movable in a straight line.

4. In a thread splicing device, relatively reciprocating thread rolling members, thread gripping jaws, means for causing said members to nip a pair of thread ends placed therebetween and at substantially the same time, said jaws to grip the thread ends and then subsequently move from said members to break the thread.

5. In a thread splicing device, a frame support,

a fixed thread rolling member mounted therein, a movablethread rolling member, a relatively fixed jaw resiliently mounted in said frame, a movable jaw slidable along the resilient mount of the fixed jaw, a lever handle mounted in said support, a carriage for said movable thread rolling member, a cam surface provided thereon engaging said resiliently mounted fixed jaw, a spring for causing said jaws to move together and said carriage to move upwardly on movement of said handle, said cam being shaped to cause said jaws to move from said members to break the thread as said members to move one along the other and roll the thread end portions, a reservoir provided on said frame, a flexible conduit causing communication of said reservoir and the surface of said element, and a pressure member engaging said flexible conduit and operated by i said handle lever for pumping liquid from said reservoir to the surface of said elements.

6. In a thread splicing device bodily relatively reciprocating thread rolling members movable in a straight line, manually movable means for operating said members and means for moving said thread rolling members apart at the start of the relatively reciprocating stroke of said members whereby the work may be easily positioned between said member.

7. In a thread splicing device bodily relatively reciprocating thread rolling members movable in a straight line, manually movable means for operating said members and means for moving said thread rolling members apart .at the end of the relative reciprocating stroke of said members for easy removal of the work.

reciprocating thread rolling members, manually movable means for operating said members and means for moving said thread rolling members apart at the start and finish of the relatively reciprocating stroke of said members whereby the work may be easily positioned and withdrawn from between said member.

9. In a thread splicing device, means for gripping the threads of a pair of ends at spaced points and moving the gripping means apart to pull the threads apart, and means for rolling the end portions of the threads to be joined one about the other.

10. In a thread splicing device, a rolling member having an edge, means for gripping a pair of ends at spaced points and pulling them both over an edge of said member to break them, and means for rolling the end portions of the threads to be joined one about the other.

11. In a thread splicing device, a rolling member having an edge, means for gripping a pair of ends at spaced points and pulling them over an edge of said member to break them, means for rolling the end portions of the threads to be joined one about the other, and means for applying adhesive to the thread end portions as rolled. j

12. In a thread splicing device, relatively reciprocating thread rolling members, thread'gripping jaws, a manually operated lever, and means responsive to the movement of said lever for causing relative movement of the members to first nipthe thread then cause a relative movement apart of said members and jaws to break the thread at a predetermined, point and subsequently roll the end portions of the thread one about the other. 7 l

13. In a thread splicing device, relatively reciprocating thread rolling members, thread gripping jaws, a manually operated lever, and means responsive to the movement of said lever for causing relative movement of the members to first nip the thread and then cause a relative movement apart of said members and jaws to break the thread at a predetermined point with frayed ends and subsequently to relatively move the members to roll the end portions of the thread one about the other.

14. In a thread splicing device, relatively reciprocating thread rolling members, thread gripping jaws, a manually operated lever, means responsive to the movement of said lever for causing relative movement of the members to first nip the thread and then cause relative movement apart of said members and jaws to break the thread and subsequently roll the end portions of the thread one about the other, and

means for applying adhesive to the thread ends as rolled.

15. In a thread splicing device, relatively reciprocating thread rolling members, thread gripping jaws, a manually operated lever, means responsive to the movement of said lever for causing relative movement of the elements to first nip the thread and then cause a relative movement apart of said members and jaws to break the thread at a predetermined point and subsequently relatively move the members to roll the end portions one about the other, and means operated by said handle for applying adhesive to the thread endsas rolled.

16. In a thread splicing device, a frame support, a fixed thread rolling member mounted therein, a movable thread rolling member, a relatively fixed jaw resiliently mounted in said frame, a movable jaw slidable along the resilient mounting of the fixed jaw, a lever mounted in said frame support, a carriage for said movable thread rolling member, a cam surface carried therebyfor engaging said resiliently mounted fixed jaw, a spring for causing said jaws to move together, a handle pivoted on said frame support, links connecting said carriage and handle to cause said carriage to move upwardly on movement of said handle, said cam being shaped to cause said jaws to-move from said fixed and movable thread rolling members to break the thread, and said rolling members to move one along the other to roll the thread end portions. 17. In a thread splicing device, means for pulling apart the threads of a pair of ends at a predetermined point to provide frayed ends, and means for rolling the end portions of the threads to be joined one about the other.

JOHN F. CAVANAGH. 

